body {
  margin: 0;
  padding: 0;
  background: url(./map.png) no-repeat #090909;
  background-size: cover;
}

.radar {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin: 0;
  padding: 0;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  border: 20px solid #f7f7f7;
  background: #000000 url(./map.png) no-repeat;
  background-position: 50% 50%;
  background-size: 150%;
  box-shadow: 0 8px 0 #c5c5c5,
        inset 0 0 100px #00ff0080;
  overflow: hidden;
}

.radar li:nth-child(1),
.radar li:nth-child(2),
.radar li:nth-child(3),
.radar li:nth-child(4){
  list-style: none;
  position: absolute;
  top: 50%;
  height: 1px;
  width: 100%;
  background: rgba(0, 255, 0, 1);
  border-radius: 50%;
}

.radar li:nth-child(2){
  transform: rotate(90deg);
}

.radar li:nth-child(3){
  transform: rotate(45deg);
}

.radar li:nth-child(4){
  transform: rotate(-45deg);
}

.radar li:nth-child(5),
.radar li:nth-child(6),
.radar li:nth-child(7){
  list-style: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(0, 255, 0, 1);
  background: transparent;
  border-radius: 50%;
}

.radar li:nth-child(5) {
  width: 120px;
  height: 120px;
}

.radar li:nth-child(6) {
  width: 240px;
  height: 240px;
}

.radar li:nth-child(7) {
  width: 360px;
  height: 360px;
}

.radar li:nth-child(8) {
  list-style: none;
  position: absolute;
  top: 50%;
  left: 50%;
  width: 250px;
  height: 250px;
  transform-origin: top left ;
  background: linear-gradient(45deg, #0f0 0%, transparent 50%);
  animation: animate 2s linear infinite;
}

@keyframes animate {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}